(19)

(11)

EP 1 250 780 A2

(12)

(88) Date of publication A3: 01.08.2002 (43) Date of publication: 23.10.2002 Bulletin 2002/43 (21) Application number: 01996949.2 (22) Date of filing: 20.11.2001

(51) International Patent Classification (IPC)7: H04L 12/56, H04Q 11/04 (86) International application number: PCT/IB0102/751 (87) International publication number: WO 0204/1573 (23.05.2002 Gazette 2002/21)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 20.11.2000 GB 0028261 (71) Applicant: Nokia Corporation 02150 Espoo (FI)	(72) Inventors: HWANG, Woonhee FIN-00200 Helsinki (FI) MARIN, Jukka FIN-02110 Espoo (FI) (74) Representative: Williams, David John et al Page White & Farrer,54 Doughty Street London WC1N 2LS London WC1N 2LS (GB)